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Yu J, Metwally H, Kolwich J, Tomm H, Klotz R, Liu C, LeBlanc JCY, Covey TR, Ross AC, Oleschuk RD. SpectraX: A Straightforward Tool for Principal Component Analysis-Based Spectral Analysis. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2024; 35:397-400. [PMID: 38217511 DOI: 10.1021/jasms.3c00322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2024]
Abstract
The analysis of complex spectra is an important component of direct/ambient mass spectrometry (MS) applications such as natural product screening. Unlike chromatography-based metabolomics or proteomics approaches, which rely on software and algorithms, the work of spectral screening is mostly performed manually in the initial stages of research and relies heavily on the experience of the analyst. As a result, throughput and spectral screening reliability are problematic when dealing with large amounts of data. Here, we present SpectraX, a MATLAB-based application, which can analyze MS spectra and quickly locate m/z features from them. Principal component analysis (PCA) is used to analyze the data set, and scoring plots are presented to help in understanding the clustering of data. The algorithm uses mass to charge (m/z) features to produce a list of potential natural products.
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Affiliation(s)
- Jian Yu
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Haidy Metwally
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Jennifer Kolwich
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Hailey Tomm
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Rachel Klotz
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Chang Liu
- Sciex, Concord, Ontario L4K 4V8, Canada
| | | | | | - Avena C Ross
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Richard D Oleschuk
- Department of Chemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada
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Monaghan J, Jaeger A, Jai JK, Tomlin H, Atkinson J, Brown TM, Gill CG, Krogh ET. Automated, High-Throughput Analysis of Tire-Derived p-Phenylenediamine Quinones (PPDQs) in Water by Online Membrane Sampling Coupled to MS/MS. ACS ES&T WATER 2023; 3:3293-3304. [PMID: 38455156 PMCID: PMC10916759 DOI: 10.1021/acsestwater.3c00275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 08/24/2023] [Accepted: 08/25/2023] [Indexed: 03/09/2024]
Abstract
The tire-derived contaminant N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine quinone (6-PPDQ) was recently identified as a potent toxin to coho salmon (Oncorhynchus kisutch). Studies investigating 6-PPDQ have employed solid-phase extraction (SPE) or liquid-liquid extraction (LLE) with liquid chromatography-mass spectrometry (LC-MS), providing excellent sensitivity and selectivity. However, cleanup and pre-enrichment steps (SPE/LLE) followed by chromatographic separation can be time- and cost-intensive, limiting sample throughput. The ubiquitous distribution of 6-PPDQ necessitates numerous measurements to identify hotspots for targeted mitigation. We recently developed condensed phase membrane introduction mass spectrometry (CP-MIMS) for rapid 6-PPDQ analysis (2.5 min/sample), with a simple workflow and low limit of detection (8 ng/L). Here, we describe improved quantitation using isotopically labeled internal standards and inclusion of a suite of PPDQ analogues. A low-cost autosampler and data processing software were developed from a three-dimensional (3D) printer and Matlab to fully realize the high-throughput capabilities of CP-MIMS. Cross-validation with a commercial LC-MS method for 10 surface waters provides excellent agreement (slope: 1.01; R2 = 0.992). We employ this analytical approach to probe fundamental questions regarding sample stability and sorption of 6-PPDQ under lab-controlled conditions. Further, the results for 192 surface water samples provide the first spatiotemporal characterization of PPDQs on Vancouver Island and the lower mainland of British Columbia.
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Affiliation(s)
- Joseph Monaghan
- Applied
Environmental Research Laboratories, Chemistry, Vancouver Island University, 900 Fifth Street, Nanaimo, British Columbia, Canada V9R 5S5
- Department
of Chemistry, University of Victoria, P.O. Box 3055, 3800 Finnerty Road, Victoria, British Columbia, Canada V8P 5C2
| | - Angelina Jaeger
- Applied
Environmental Research Laboratories, Chemistry, Vancouver Island University, 900 Fifth Street, Nanaimo, British Columbia, Canada V9R 5S5
| | - Joshua K. Jai
- Applied
Environmental Research Laboratories, Chemistry, Vancouver Island University, 900 Fifth Street, Nanaimo, British Columbia, Canada V9R 5S5
| | - Haley Tomlin
- British
Columbia Conservation Foundation, 1885 Boxwood Road #105, Nanaimo, British Columbia, Canada V9S 5X9
| | - Jamieson Atkinson
- British
Columbia Conservation Foundation, 1885 Boxwood Road #105, Nanaimo, British Columbia, Canada V9S 5X9
| | - Tanya M. Brown
- Pacific
Science Enterprise Centre, Fisheries and
Oceans Canada, 4160 Marine Drive, West Vancouver, British Columbia, Canada V7V 1H2
- School
of Resources and Environmental Management, Simon Fraser University, 8888 University Drive West, Burnaby, British Columbia, Canada V5A 1S6
| | - Chris G. Gill
- Applied
Environmental Research Laboratories, Chemistry, Vancouver Island University, 900 Fifth Street, Nanaimo, British Columbia, Canada V9R 5S5
- Department
of Chemistry, University of Victoria, P.O. Box 3055, 3800 Finnerty Road, Victoria, British Columbia, Canada V8P 5C2
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6
- Department
of Environmental and Occupational Health Sciences, University of Washington, 1959 NE Pacific Street, Seattle, Washington 98195-1618, United States
| | - Erik T. Krogh
- Applied
Environmental Research Laboratories, Chemistry, Vancouver Island University, 900 Fifth Street, Nanaimo, British Columbia, Canada V9R 5S5
- Department
of Chemistry, University of Victoria, P.O. Box 3055, 3800 Finnerty Road, Victoria, British Columbia, Canada V8P 5C2
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